Orthodontia appliance.



C. F. MONTAG.

ORTHODONTIA APPLIANCE.

APPLICATION FILED AUG.H, 1913.

1,140,759. Patented May 25, 1915.

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r to its face a tube STATES PATEN onnio GHBISTOPH FRIEDRICH MONTAG, OF BLUE ISLAND, ILLINOIS, ASS-IGNOR TO BLUE ISLAND SPECIALTY COMPANY, OF BLUE ISLAND, ILLINOIS, A CORPORATION OF ILLINOIS.

. ORTHODONTIA APPLIANCE.

Specification of Letters Patent.

Patented May 25, 1915.

Application filed August 11, 1913. Serial No. 784,244.

To all whom it may concern Be it known that I, GHRIsTorH FRIEDRICH MONTAG, a citizen of the United States, residing at Blue Island, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Orthodontia Appliances, of which the following is a specification.

My invention relates to certain new and useful improvements in orthodontia appliance, and is fully described and explained in the specification and shown in the accomdrawings, in which Figure 1 is a plan view showing my improved device applied to the teeth in the position of use; Fig. 2 is a side elevation; Fig. 3 is an enlarged detail view, partly in perspective and partly in section, of certain of the parts, and Fig. 4 is a section on the line 4 of Fig. 3.

Referring to the drawings, 5 are anchor bands to which are attached tubes, customarily buccal tubes, but possibly on the opposite side of the teeth. Through each of the tubes 6 is run a screw-threaded bar 7, held in place by nuts 8. On the mesial end of each of the rods 7 is an adjusting member 9, threaded at one end to engage the rod 7 and having at its opposite end a socket 10.

11 is an arch band, preferably of oval cross-section, as shown in Fig. 4. p

12 are bands placed upon the teeth to be adjusted, each of said bands having soldered 13 parallel to its axis. Within each of said tubes is a pin 14, split at its free end and notched at 15 to spring over the end of a tube 13, as best shown in Fig. 4. The pins 14 are attached to sleeves 16, each of which is preferably oval in crosssection to conform to the cross-section of the arch band 11.

The present device is particularly designed for What is known as bodily movement of the teeth, that is, movement in which the tooth moves as a whole, in a line at rightangles, or substantially at right-angles to its axis, the root moving with the crown. The arch band in my device is moved bodily forward by rotating the adjusting members 9, which thus move forward upon the bars 7 and force forward the ends'of the arch band which are swiveled in the sockets 10. Movement of this character is made more ready by reason of the fact that the arch band is placed adjacent to the .gingival margin of the teeth, and the band to which the arch band is attached receives its force close to said gingival margin. However, such movement is made still more certain by the fact that the arch band is oval in cross-section and therefore the pin 14 cannot rotate with reference to the arch, but maintains a fixed position with respect thereto. Therefore, the band 12, on the tooth to be adjusted, cannot possibly swing about the axis of the arch band, as it would have to were the upper end of the tooth to be tilted independent of the root thereof. It has heretofore been proposed to secure this type of movement by engaging with tubes (like the tube 13 on the band 12), pins soldered to the arch band. This practice is satisfactory Where the arch band is of a precious metal, as gold or platinum, but in the case of the base metals, such as German silver, the act of soldering draws the temper and the arch band loses the elasticity so essential to its properly performing its function. The present arrangement is particularly designed, therefore, for use with base metals, the radial pin being readily fixed in position, by reason of the non-circular crosssection of the arch band.

I am aware that considerable variation is possible in the details of the construction herein shown, and I do not intend to limit myself thereto, except as pointed out in the following claims, in which it is my intention to claim all the novelty inherent in the device as broadly as is permitted by the state of the art.

I claim as new and desire to secure by Letters Patent,-

1. In an orthodontia appliance, a band adapted for attachment to the tooth to be moved, a tube thereon, generally parallel to the axis thereof, an arch band oval in crosssection, a sleeve thereon of oval cross-section fitting the arch band to be non-rotatable thereon, a pin projecting radially from said sleeve and entering the tube upon the aforesaid band, said pin being split at its outer end to afiord elasticity and having enlarged heads formed on the split ends to spring over the end of said tube.

2. In an orthodontia appliance, an anchorband, ,a tube attached thereto,..a,,,threaded ,,-I fi;test iiony whereofl have hereunto set bar adjustably secured in said tube, .an. ad? my hand this 31st day of July, 1913. ustinv member, threaded 0n the bend of said tireaded bar and havlng asocket at 5 its opposite end, and an arch' having its In presence (if two subscribingwitnesses:

end seated in said socket to be adjusted F ANK A. VINCENT, thereby. L. H. NELSON.

of bateht meg ebtained dc fits gdc l ressing the commissiom' l Washington, D. 0. 

